Bellows mechanism for electric relays



May 8, 1923. 1,454,129

' O. J. MARSHlCK BELLOWS MECHANISM F OR'ELECTRIC RELAYS Filed May 5, 1918 Q1 fl a! 'L Q] i 'g n3 INVENTOR ATTORNEY Patented May 8,1923.

a citizen'of the United, States, residing at i I g ionx vi nafrannsx ircir; onfnnnnorr, iric'irienn.

nae

Be it known that l; iOLIVER J. 'lVIARdliIQK,

i "Detroit,"'connty of Wayne, State of Michigan, have invented certain newand useful Improvement in Benwe; Mechanism for Electric Relays, and'declare the-following to be a full, clear, and; exact descriptionfloglf the same, suchias willenab'leoth'ers skilled in the 1 art to which it pertainstojmakeand use the same, reference being the accompany" ing' drawings, wh1chr"orm apart or this specificatlon."

This inventioiirelates tobellows and valve mechanism" particularly adapted for merly dependent on the action of a dash-pot." V

I In the drawings g section; of my improved apparatus, together "with enough of thel 'eonn'ected I and co'op'erat-v f ing'parts of the relay to illustrate its use.

Figure 2 is an enlarged elevational view oithe bellows'and its connected valved pipe.

. j Figure 3 is. a partly "sectional view of the device i'n' iniierted position", wherein a spring is employed-to yieldingly hold the ball valve on its seat. N ""1."

A indicates the rel'a v{ fr me; from whose I bottom portion depends theL-s hap'ed bracket .L, to whose tip the solid lower end of the stem B is connected and united by va screw or pin C. From about the center of the stem 13 projects a lateral branch D, in which engages the thumb screw E. This screw stops short of reaching the hollow center H of the stem B, and extending lengthwise thereof for a part of its length is the tapered slot Y. WVhen the screw is projected to its limit into the branchD, theonly chance for the passage of air therethrough is around the threading; but when the screw is partly retracted from the branch D, the outer end of the slot Y connects with the air space U between the' end of the branch D and the'adjacent face of the inverted castell'ated nut Z. The ball F normally rests on the seat G' at ,the lower end of the hollow'portion H of v the stem, and this is connected with the outer air by the L-shaped passage J. From the. upper end of the hollow portion H leads a 'apipe connected with the opposite end of the bellows member I from that externally,

pipe 0, which leads through the invertedsaucer-shaped member K which serves as the v f Figure-l is an .elevati'onal View, v p'ar'tly in base of one of the bellows membersywhose lower and uppertruncated cone portionsM= and N'are united into one chambenby; the} rigidring P and hoops Q. "The'lower end of the pipe Oflmay be notched orcutaway; in places, as at I, so that even when't'he'ball seats thereagainst, theclosure will not be 7 complete. .Atthe topofthe upper section NY I ofthe bellows is a dished' plate 'R, similar to the member K already describedfifrorn I whiclrrises the threaded stenr S-fhywvliiclr whole connected;withthe" the bellows as a v 1 110 plungerr'l ofthe relay.

When the hell we is expanded by rise 1 of the relay plunger -T, the ball a1 vg ,r1is-' strongly drawn? from its seat, L allowing anto rush through the onto its seat'fi sowhen the weigl it; of the passage-J intol'thezin terror "of the bellows. y When however; the lnrush ofayi'r ends,'the -ball"valve Efalls back,

relay plunger fall'son the -b l1o' s, the de- ,v flation thereof proceeds slowlybr rapidly, as

may be desired, through the taperedfslotYf 'andlair space I]. This results in the i'n tro duction of thefdesired time element in break; 7

ing the contacts of the relayand'yet revsponse ofthe device toftlrepiill of the relay plunger is "fully as prompt {as f T e ma a s be 1 8 1 infrev e i 5 it position from that shown n Figure l, being" shown fragmentarily in such position in Fig ure 3.- In this position a spring V' is em; ployed to yieldingly presslthe ball valve on its seat; the response of the belldwstoh fiation of the bellows. for the same reason as before, namely the small air passage past thescrew, or through the tapered slots Y therein.

What I claim is: p l. A. retarding devicefor an electric relay,

having in combination a fluid-tight bellows member adapted to bedrawn to expanded the falling movement ofthe plunger is'th en the quick one being the one then resulting in the inflation of the bellows, whereas the dropping oif'the plunger causes the slow devariations in alignment of the parts by neg I ligible differences intheir degree ot expansionjon one side ascontrasted with the other,

connected with the expanding means, a norlows during its deflation.

mally closed valve in said pipe adapted to be unseated by the inrush of air when the bellows member is distended, and regulatablev means vconnected with said pipe for permitting the-escape of air from said bel- 2'. In combination with a bellows member connected at one end therewith and adapted to be drawn to expanded' position bythe movement thereof, I said bellows member automatically lending itself to the offsetting of frictional retardation to the action of the metal parts due to slightdepartures fromentire alignment, a' valve adapted to permit'the inrush of air into said bellows when the same is expanded and to be closed when the deflation move ment thereof begins, and a valve-controlled pipe, connected with the opposite side of the bellows from the plunger member for permitting the deflation of said bellows to proceed slowly in spite of the closed position of said valve. a a

3. The combination, with a bellows mem ber capable of a diverse degree of expansion on one side as contrasted with the other, of

an actuating plunger connected with one end flow of airthrough the other opening in the pipe, whereby the deflating flow of air may thereafter regulatablycontinue. 4. The combination, with an, expansible aplunger member,

bellows member, adapted to lend itself to variations from exact alignment of its connecting parts, of a plurally branched inlet and outlet pipe connected with one .end' thereof, a valve member appurtenant to one of the branches of said pipe, adapted to be unseated by the inrush of air due to the ex pansion of said bellows and to be seated when the deflation of the bellows begins, a valve controlling the other branch ofgsaid pipe, whereby the outflow of air dueto the deflation of the bellows may be regulatably permitted, andan actuating plunger connested with the opposite end of the bellows from that with which said pipe is connected, 5. A time-limitingdevice for an electric relay,having in combination a longitudinally expansible bellows member, {the degree of whose expansion on one side as contrasted with the other automatically lends itself to compensating for slight variations'from' true alignment of its connected actuating parts, means for vefl'ectlng its distension to an unusual degree proportionately to the .aXi-

ally longitudinal movement involved and for thereafter applying pressure thereto to effect its deflation, a pipe leading from/the other side of said bellows from that with which. said distending and deflatingmeans is connected, a valve in said pipe adapted to permit the rapid inrush of air whenjthe bellows is distended, and adjustable means appurtenant to said pipe for regulating the speed of escape thereof proportionately to thelows. V

In testimony whereof I signthis cation in the weight applied to the other side of the ,belr i 

